Guys i am developing weld procedures for automated orbital welding and having trouble trouble with achieving required hardness.
-- SA-516-70N 2"Thk tube sheet / SA-179 1"OD x 6"Lg Tubes different wall thickness. Preheating 400 interpass 600 F
I am having isues with hardness on the heat affected zone. The criteria to meet is 248 Hv10 (vickers). Especially at the Haz zone iam getting 300 vickers.
Anyone have experience in tube to tube sheet welding can offer some suggestions that will be great.
My best results were in 0.095 wall thickness where HAZ readings were close to 250 still failed becauseit was marginally over. 0.065, 0.83 failed with HAZ hardness averaging at 300.
Best reagrds
Tesh
https://materials-welding.blogspot.com/
https://www.linkedin.com/groups/122787
---
You received this message because you are subscribed to the Google Groups "Materials & Welding" group.
To unsubscribe from this group and stop receiving emails from it, send an email to materials-welding+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/materials-welding/776b4b23-3024-45d2-8195-213b304707f4%40googlegroups.com.
No comments:
Post a Comment